Mazda CX-5 Service & Repair Manual: Air Fuel Ratio (A/F) Sensor

Mazda CX-5 Service & Repair Manual / Engine / Control / Air Fuel Ratio (A/F) Sensor

Purpose/Function

Detects the oxygen concentration (all-range air/fuel ratio) in the exhaust gas as basic information for mainly determining the fuel injection amount.
Detects the oxygen concentration (all-range air/fuel ratio) in the exhaust gas and inputs it to the PCM as an oxygen concentration (all-range air/fuel ratio) signal.

Construction

Installed to the exhaust manifold.
A zirconium element has been adopted as the detecting element for detecting the oxygen concentration (all-range air/fuel ratio).

Operation

Inputs the signal, which fluctuates according to the oxygen concentration (all-range air/fuel ratio), to the PCM.

A/F sensor characteristic

Fail-safe


DTC No.	Fail-safe function
P0031:00	Stops the fuel feedback control.
P0032:00	Stops the fuel feedback control.
P0130:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P0131:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P0132:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P0134:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P064D:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P2237:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P2243:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P2251:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.

Air Fuel Ratio (A/F) Sensor Removal/Installation

WARNING: A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system. CAUTION: Do not allow fla ...

Camshaft Position (CMP) Sensor Inspection

Intake CMP Sensor Visual inspection CAUTION: When replacing the CMP sensor, make sure there is no foreign material on it such as metal shavings. If it is installed with foreign material, ...

Other materials:

Washer Fluid
InspectingWasher Fluid Level WARNING Use only windshield washer fluid or plain water in the reservoir: Using radiator antifreeze as washer fluid is dangerous. If sprayed on the windshield, it will dirty the windshield, affect your visibility, and could result in an accident. Using Washer Fluid ...

Oil Control Valve (OCV) Removal/Installation [Skyactiv G 2.0]
WARNING: A hot engine can cause severe burns. Turn off the engine and wait until it is cool before servicing. 1. Disconnect the negative battery cable.. 2. Remove the plug hole plate.. 3. Remove the ignition coil/ion sensors.. 4. Remove the cylinder head cover.. 5. Remove in ...

Lighting System Personalization Features Setting Procedure
Turn Light System There are two methods for personalizing the turn light system: One using the M-MDS and the other using the audio unit (with color LCD). Refer to the following and perform the setting. Method using M-MDS CONTROL SYSTEM PERSONALIZATION FEATURES SETTING PR ...